Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'bf412a3bc1650ffbd3695e738cec23df16e0a871ed1042dbd5b45a072b514a02' 
  AND token = '6Onves7RDMPpxS9REm0E/7C7ciwHcUuHp4rwOVDSdEs=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}